Quick clamp and drill guide



w.`1. GRIFFIN. QUICK- CLAMP AND DRILL GUIDE.

APlIQATION FILED MAY 2l, |920. i 154352,45@ Patented oet. M1922.

2 SHEETS-SHEET l.

W. I. GRIFFIN.

QUICK CLAMP AND DRILL GUIDE.

APPncATloN man MAY21, |920.

114432,45@ Patented Dot. 117, 1922.

2 SHEETS-SHEET 2.

Patented @et i7, i922.

QUCK CLAMP AND DRLL GIIDE.

.Application IedUlVZay 21,

To all w hom it may can cera.'

Be it known that l, WrLLrAM J. GRIFFIN, a citizen of the wUnited States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented new and useful improvements in Quick Clamp and Drill` Guides, of whichr the following is a speclication.

My invention relates to a new and useful improvement in quick clamp and drill guides, and has for its object to provide an exceedingly simple and effectivedevice of this description which may be readilyapplied to the object to be drilled, suchas the hull of a ship for setting and holding a drill. A .further object of my invention is to utilize the reinforcement or frame ef a port inforcementor frame will accurately center the clamp.

A still further kobject of my invention is to provide for the quick adjustment of the parts to economize ,time in placing and removing the device.

With these endsin view, this invention consists in the details ofconstruction and combination of elements hereinafter set` forth and then specifically designated by the clalim.

- In order that those skilled in the art to which this invention appertains,may understand how to make and use the same, ll will describe its construction in detail, referring by numerals to the accompanying drawing forming a part of this application, in which :4

Fig. 1, is a plan view of my improved clamp applied to a porthole showing the reinforcement or frame in position.

Fig. 2, is a central section of the port hole or frame'and a portion of the hull of a ship showing my device in elevation and applied thereto.

Fig. 3, is an enlarged perspective of the upper clamping bar.

Fig. 4, is a view similar to Fig. 8 of the lower clamping bar.

In carrying out my invention as here embodied, 1 represents the post of what is 192m Serial No. 383,093.

known in the .trade as an old man, and the `lower portion of this post is threaded for the reception of the wing nut 2, the 'wings 3 thereof being of sufficient length to give the proper purchase for clamping purposes.

4 represents the upper clamp bar having the heads 5 formed upon each end thereof?, each head being provided with the lips 6 and Z the distance between the lips 7 heinoof less diameter than the distance betweeii the lips 6 for the purpose hereinafter eX- plained. Thls bar has an enlargement V8 at the central portion thereof through which is formed the hole 9 of suliicient size to pass over the threaded end of the post in lorder that the hand nut 2 may be brought to bear upon said enlargement.

l 10 represents the lower clamp bar having its ends turned upward as indicated at 11 for contact with the outside of the plate 12 of the ships hull, and this bar alsoA has its center enlarged as indicated at 13, and a threaded hole 14 formed therethrough for running upon the threaded end of the post. l/Vhen the bar 10 iis run upon said post it is kheld against displacement by the set screw .15 which is threaded through a suitable hole in the central enlargement of the bar, and the post is provided with a groove 15n for the reception of the end of the set screw to prevent the burring of the threads upon the post which would otherwise take place if a set screw contacted with said threads.

16 represents the arm of the old man having a hub 17 anda hole 18 formed therethrough for passage over the upper end of thepost, and this hub is provided with the ears 19 which are separated by the slot 20 in order that the hub may be rigidly clamped upon the post in any adjustment, the clamping'means consisting of a bolt 21 passed through suitable holes in ears and having a nut 22 run thereon, said bolt terminating in a hand lever 23 for its operation.

24 represents the port hole reinforcement `lit over the outer circumference of the frame 24 thus positioning the clamps after which by screwing up upon the hand nut 2 the clamp bars will be drawn toward each other and the frame 24 securely held in position and likewise rigidly setting the old man. Afe terthis has been accomplished the arm 16 yis swung over one of thefholes Q5 and the drill plates in position, the -bit thereof passing into the hole 25 so that the operation of the drill will thereafter bore a hole through the platejl in enact alignment with the hole 25. This operation is'repe'atedbjf/ turning the 'arm 16 from one hole to another until all of the holes have been drilled through the plate l2 to correspond with the 'number of holes 25 in the port-hole frame.

' After'the drilling has been accomplished the clamp bars may be'left in position until two or more bolts have been set thus'pr'event? ino' an f shiftinoa of the Jort hole frame and b CJ `thereby saving considerable time and labor.

When port hole frames of smaller diameter are used the clamps y l are reversed upon the post so' as to bring the lips Tinto active position, thus making the device capable of use upon port hole frames of two sizes and when a further variety of port liole frames Aare, met with, one or more *other clamp bars I may be utilized having the lips 6 and 7 differently spa'ced'from those shown, thus giving the device a wide range and as the parts thereof are quickly adjustable a great saving is effected. n

One of the marked advantages of my improvement is that the device may be applied to the `object in which the holes areto be drilled from one side 'and in case of'k shipbuilding this is a great advantage since a second workman does not have to gov outside of the hull for placing clamps for holding thefold man as the work canbe done entirely from the inside of the hull.

Another marked advantage of my improvement is that as the clamp bars 4l and lO'may be placed at substantially right anglesto each'otherwhen the device is secured in place, these clamp bars brace the'pos't in every direction giving great rigidity to the arm'l for facilitating the operations ofthe drill.

Of course I do not wish to be limited to the exact details of construction as herein shown as these vmay be varied within the limits'. of p the appended' claim without departing from the spirit of my invention. l Having thus fully described my invention,

l what I claiml as new and useful A device of the character stated adapted to beclamped across a port hole in a structure comprisingy in combination, a clamp bar adapted to bridge the port hole, two lips at each end of the bar projectingin opposite directions and located different distances from the center of said barg, said lips adapted to engage the edges of a frame surrounding the port hole, a'po'st passing'through the center of the clamp bar, a second clampnbar adapted to bridge the porty hole yand having upturned end to engage the structure in the region of the port hole, said second named clamp bar having threaded connection lwith the post and means also haulingA threaded connection with the post andv adapted to engage the first' mentioned-'clamp bar for"vv drawing said clamp bars toward' eachother. In testimony whereof, I have hereunto ai'lixed my signature.v

wiLLrAM J. GRIFFIN; 

